<%= nav_menu "首页", "/", "index" %>
<%= nav_menu "学校", "/schools/", "schools" %>
<%= nav_menu "活动", "/events/", "events" %>
<%= nav_menu "灾后重建", "/dizhen/", "dizhen" %>
<%= nav_menu "图片", "/photos/", "photos" %>
<%= nav_menu "社区", "/groups/", "groups" %>